Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a7df4a62ac7212a…

MALICIOUS

PDF

83.9 KB Created: 2021-09-07 14:33:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7e58117c826d1dcc04a9c19875f08b13 SHA-1: 542a7a2b8d50ba667e3d48323e731aebdb47bc13 SHA-256: 5a7df4a62ac7212a8c4de229bb5ffc7c84c6a0a4c61cfad1532e637f3e27fd4b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous links pointing to compromised websites, indicating a likely phishing or malware distribution scheme. The PDF structure suggests it's a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9de6b5a3f---golovefelefugodelolelo.pdf In PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a837d2f0d00---turebivubarogemigefu.pdfIn PDF document text
    • http://sevvalturizm.com/rsm/files/gizupatuxipufegosajizazu.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160baf082de547---78319413748.pdfIn PDF document text
    • https://dukeofmarshall.com/ckfinder/userfiles/files/pipejelixoziresawitutot.pdfIn PDF document text
    • http://designerhouse.ru/upload/files/1985762067.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/l5ht023q6ugbg3q15lj2ph8fd3/xekifarakumow.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/zibidaramugevakadigi.pdfIn PDF document text
    • http://weingut-suppan.at/files/69988545154.pdfIn PDF document text
    • http://giacongcomposite.com/upload/ck/files/segasuzen.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b8bc5a7eb---vigezuwifinemujifilu.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/nexegogo.pdfIn PDF document text
    • http://daikinhbac.com/upload/files/visojegumijexub.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/3a9a5cc40ec19a729085411db7017006/rinixelegido.pdfIn PDF document text
    • http://wimborst-ceramics.nl/ckeditor/ckfinder/userfiles/files/mujapomivunujowurezofase.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/barekeda.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887a1914caa---diwemibowi.pdfIn PDF document text
    • https://sp-pir.ru/wp-content/plugins/super-forms/uploads/php/files/a32d55ee3801c9530ea6c793eee52d12/62610785943.pdfIn PDF document text
    • https://gad-elhak.com/userfiles/file/senebekifilusadex.pdfIn PDF document text
    • https://champion-osk.pl/userfiles/file/46230093861.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/62971193558.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/7eab845d5203a0f3911753a230aa855d/66632966469.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/5d43afca0c4e9d8e46918c9fee79092f/52301968397.pdfIn PDF document text
    • http://cn-noah.com/uploadfile/file/fosavifavapolipija.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=parts+and+functions+of+endocrine+system+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B9 10952 bytes
SHA-256: 2cfcca208834acd918762e6b4d4cb655089554bdb2ae74236360c0dfa82fec73
font_01_sfnt_off0000fe2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2D 16788 bytes
SHA-256: ce408dbc3822160fb9daed85f0d11486db23d55b3fb043545e12449ea2ce19f2
font_02_sfnt_off00012953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12953 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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